Software Development Lifecycle in 9 minutes!
Summary
TLDRThis video script delves into the Software Development Lifecycle (SDLC), outlining its seven key phases: planning, requirement analysis, design, implementation and coding, testing, deployment, and maintenance. It emphasizes the critical role of testers and quality assurance analysts in identifying bugs and ensuring software meets requirements. The script also highlights the iterative nature of SDLC, where new features and requirements prompt revisiting earlier phases to enhance the application.
Takeaways
- 🔍 The Software Development Lifecycle (SDLC) is a process that encompasses the conceptualization, development, and maintenance of software.
- 📈 There are seven key phases in the SDLC: Planning, Requirement Analysis, Design, Implementation and Coding, Testing, Deployment, and Maintenance.
- 🤝 The customer initiates the process by outlining their business idea and requirements for the software application, working closely with the product owner or project manager.
- 📝 Requirement Analysis involves detailed planning and definition of each requirement with the collaboration of developers, product owners, and testers.
- 🎨 The Design phase includes planning the product's business rules, user interface, programming languages, frameworks, and system architecture.
- 💻 Implementation and Coding is where developers write code, designers finalize the UI, and testers prepare test cases, ensuring early detection of usability issues.
- 🔍 The Testing phase is crucial for identifying and fixing bugs before they reach production, safeguarding the software's quality and security.
- 🚀 Deployment involves setting up production environments, scaling resources, and preparing the application for live use by real users.
- 🔧 Maintenance is an ongoing phase where the application is monitored, supported, and updated to handle new user loads, fix bugs, and possibly introduce new features.
- 🔄 The SDLC is iterative; after maintenance, new features and requirements may lead to restarting the cycle to enhance the existing application.
Q & A
What is the Software Development Lifecycle (SDLC)?
-The Software Development Lifecycle (SDLC) is the process by which software is conceptualized, developed, and maintained, encompassing planning, requirement analysis, design, implementation and coding, testing, deployment, and maintenance.
What are the seven key phases of the SDLC?
-The seven key phases of the SDLC are: 1) Planning, 2) Requirement Analysis, 3) Design, 4) Implementation and Coding, 5) Testing, 6) Deployment, and 7) Maintenance.
Who is typically the initiator of a software project?
-The initiator of a software project is usually the customer, who has the business idea and the funding to start the project.
What is the role of the product owner in the SDLC?
-The product owner in the SDLC works with the customer to outline the requirements of the application and is responsible for creating tickets in a project management system based on the defined requirements.
Why is the testing phase considered crucial in the SDLC?
-The testing phase is crucial because it ensures that all requirements have been met, functionality works as expected, and identifies bugs that could be critical if not caught before deployment.
What are the responsibilities of a tester during the testing phase?
-During the testing phase, a tester is responsible for executing test cases, validating requirements, ensuring functionality, finding and reporting bugs, and working with developers to resolve these issues.
How does a bug tracking system work in the context of SDLC?
-In the context of SDLC, a bug tracking system is used to report, track, and manage the life cycle of bugs. Testers report bugs, which are then assigned to developers for fixing, and once resolved, the issue is assigned back to the testers for verification.
What happens during the deployment phase of the SDLC?
-During the deployment phase, the operations team prepares the production environment by mirroring the development setup, installing new hardware, setting up databases, and ensuring scalability and readiness for real users.
What is involved in the maintenance phase of the SDLC?
-The maintenance phase involves monitoring and managing the application post-deployment, addressing production support issues, fixing bugs, and potentially scaling up resources to handle increased load or user numbers.
How does the SDLC handle new features and requirements after the initial release?
-Once in the maintenance phase, new features and requirements are introduced, which can restart the SDLC process to incorporate these changes into the existing application.
Outlines
📈 Understanding the SDLC Process
This paragraph introduces the Software Development Lifecycle (SDLC), which is a process that encompasses the conceptualization, development, and maintenance of software. The SDLC consists of seven key phases: planning, requirement analysis, design, implementation and coding, testing, deployment, and maintenance. The paragraph also describes the initial interaction between the customer with a business idea and the tech company, leading to the project acceptance by the company's product owner or project manager. The customer and product owner then outline the application's requirements, which are further detailed in subsequent phases of the SDLC.
🔍 Deep Dive into SDLC Phases
The paragraph delves into the specifics of each SDLC phase. It starts with requirement analysis, where the team defines and plans the application's features. The design phase involves planning the product's aspects such as business rules, user interface, and technical architecture. The implementation and coding phase is where developers write code, designers finalize the UI, and testers create test cases. The testing phase is highlighted as crucial for identifying and fixing bugs before they reach production. The deployment phase is about preparing the production environment, and the maintenance phase involves ongoing support and updates to the application. The paragraph concludes by emphasizing the cyclical nature of the SDLC, where new features and requirements can trigger another cycle.
Mindmap
Keywords
💡Software Development Lifecycle (SDLC)
💡Requirement Analysis
💡Design Phase
💡Implementation and Coding
💡Testing Phase
💡Deployment
💡Maintenance
💡Product Owner
💡Test Cases and Test Plans
💡Bug Tracking System
💡Iteration
Highlights
Introduction to the Software Development Lifecycle (SDLC) process
Seven key phases of the SDLC: Planning, Requirement Analysis, Design, Implementation & Coding, Testing, Deployment, and Maintenance
The role of the customer in conceptualizing the software and initiating the project
Engagement of the product owner or project manager in the planning phase
Collaboration between the customer and product owner to outline application requirements
Iterative approach to SDLC with new requirements and features added in each cycle
Requirement Analysis phase involving the whole team to define each requirement in detail
Design phase includes planning for business rules, user interface, programming languages, and system architecture
Implementation and Coding phase where developers write code and testers build test cases
Testing phase's criticality in identifying and preventing bugs before deployment
The tester's role in imagining application usability and identifying fundamental flaws early on
Deployment phase involves setting up production environment and preparing for real user traffic
Maintenance phase focuses on server monitoring, load management, and addressing production support issues
The cycle of bug identification, reporting, fixing, and redeployment in the maintenance phase
The continuous nature of SDLC with new features and requirements leading to repeated cycles
Importance of the testing phase in ensuring security and functionality of the application
The interplay between development, testing, and deployment in the SDLC process
Transcripts
in order to understand what a software
tester or quality assurance analyst does
you first need to understand the process
by which the software is conceptualized
developed and maintained
this process is known as software
development lifecycle or the sdlc
there are seven key points to
understanding the software development
life cycle
phase one planning
phase two requirement analysis
phase three design
phase four implementation and coding
phase five testing phase 6 deployment
and phase 7 maintenance
[Music]
so it all starts with this guy the
customer
he's the guy that has the business idea
for our invoice application and the
money to get it started
he's going to reach out to multiple
different tech companies until he finds
one that he likes
finally he's going to meet our company's
product owner or our project manager
they're going to discuss terms of their
agreement sign a deal and accept the
project
this will move us into the next phase
planning the requirements
together the customer and the product
owner will outline the requirements of
the application
let's imagine that the requirements that
they've both agreed upon are as follows
one user registration
two
login
three
log out
four
the dashboard landing page
and so on and so forth
throughout this course we'll be running
multiple iterations of the sdlc to which
new requirements and new features will
be added
now that we have the outlined
requirements let's take them and move on
to the requirement analysis phase
here's our team operations developers
product owners and testers
we'll all meet up at an office for a few
hours and define each outlined
requirement and give more planning
details
let's start with requirement number one
user registration we'll need a username
input field a password field a check box
to accept the terms and conditions
a submit button
and the ability to save the user into
our database
then we'll move to requirement number
two the login
we'll need a login page to allow
returning users to log back into our
system
for this we need another username input
field
a password field along with another
submit button
from this we'll need to read the user's
information out of the database and log
them into our system
requirement number three will require a
logout button usually located around the
same area where the user was logging in
from when they press the logout button
it should clear their session out of the
browser to prevent other people from
returning and logging back into their
account
finally requirement number four the
dashboard this will essentially be the
home page of our application
after a new user is registered they
should be redirected to the dashboard
also when the user logs in with the
returning account they should be
redirected to the dashboard
for our first sdlc i will keep the
requirements easy in upcoming videos
we'll dive further in with much harder
customer requirements
once all of the requirements have been
analyzed by the team and defined
the product owner will take all the
defined requirements and create tickets
in a project management system
from here we'll move into the design
phase of the sdlc
the design phase takes all the
requirements and starts to plan the
product
the design phase may include the
business rules
the user interface layouts
color schemes
what programming languages to use
frameworks
system server design
database relationships
architect of the application
mobile aspects
supported browsers
and much more
next we'll discuss the implementation
and the coding of the application
the implementation and coding phase is
where everything starts to become fun
the operations team will set up the
physical hardware for the servers the
developers will start writing the code
the designers will continue planning the
user interface
and the testers will analyze the
requirements and start building test
cases for their test plans
even in this stage testers are
incredibly valuable they start to
imagine the usability of the application
and see how everything flows together
sometimes while writing test cases they
can discover things don't make sense and
help redesign fundamental flaws in the
early stages of the application
next up we'll be discussing one of the
most important phases which is the
testing phase
so why is the testing phase so important
imagine that the developer has finished
coding some of our new features in our
requirements we found that when the user
logs out
that it's not actually clearing the
session in the browser
and that another
person can walk up to their computer
click the login button or click the
refresh on the page and they gain access
to their account
get access to all of their money and
start making payments on various things
they'd be huge and expensive terrible
bug that would get released if we didn't
have testers to test these types of
things beforehand
so what does a tester actually do during
the testing phase
[Music]
now that we have the servers all set up
and the database is set up developers
have finished coding they've given us an
application an actual website that we
can log into now
now we can start testing and executing
our test cases from the test plans that
we've created
validate that all of the requirements
have been met
make sure all the functionality is
working as expected
find as many bugs as we possibly can
which could be color scheme is incorrect
or there's a user interface bug
somewhere the critical issue people not
being able to log out maybe the users
can't even register there's so many
mistakes that developer can make and do
make frequently
so as we're testing we start to find
bugs and what we'll do is we'll report
them into a bug tracking system which is
then assigned to a developer
they'll go in and they'll fix the bug
fix the issue and assign it back to us
this is called a bug of life cycle you
may have noticed that i've mentioned
test cases test plans
and bugs
in the upcoming videos we'll go into the
bug life cycle
iterating with developers
and how to write test plans and test
cases
up next we'll talk about the deployment
phase
the deployment phase the operations team
will end up mirroring the staging or
development environment systems that
we've been testing in and get them ready
for production meaning that they'll
install new hardware brand new servers
have everything scalable for production
this includes setting up the links
setting up the databases for real users
syncing up with the development teams
and release managers
once they've completed all of these
tasks our application will go live to
real users
this brings us to the final phase of the
sdlc
maintenance
so imagine that we've released and our
application became so successful we're
just getting millions of users logging
in and registering and using this
application
so we need to maintain
the servers in the environment they need
to monitor the load the stress
everything coming on the servers by so
many users logging in and using it it
doesn't bring down the system maybe we
need to make larger servers larger
databases maybe we need to get faster
computers there's a lot of stuff that
goes under in the maintenance phase
there will be bugs found in production
it's called production support
frequently users will email with their
issues and you can stop and investigate
what they're complaining about or what
their issue is
figure it out
write up a bug
get it resolved and do another
deployment to production with issues
fixed
so to summarize we've discussed planning
requirement analysis design
implementation and coding testing
deployment and maintenance
all right awesome that wraps up the
video on the sdlc
one last thing to say is once we're in
the maintenance phase new features will
come through new requirements will come
through and we'll restart the whole
process again and be able to get new
stuff added into our existing
application
[Music]
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